Study On Path Planning And Transmission Timing For The Heterogeneous WSN

In the monitoring area where the terrain is complex and the environment is harsh,the wired data acquisition and transmission methods are often difficult to set up and costly.The Wireless Sensor Network(WSN)is more capable of data collection and transmission tasks because of its low power consumption,low cost,small size,and geographical environment constraints.In recent years,the homogenous wireless sensor network(HWSN)with the same structure of sensor nodes has developed rapidly.Many achievements have been made in its routing protocols,life cycle extension,node positioning,and network security delay control.With the development of society,the monitoring requirements become more and more complicated.Heterogeneous Wireless Sensor Network(HWSN)has different sensing,computing and communication capabilities and initial configuration parameters,and they will be more suitable for increasingly sophisticated sensing world surveillance requirements,therefore,research on heterogeneous wireless sensor networks has also become increasingly important.At present,the research on heterogeneous wireless sensor networks is very limited.At the same time,the service life and service quality of the network itself are also limited by the limited energy and limited computing capabilities of the sensor nodes.In accordance with the heterogeneity of wireless sensor networks,their routing protocols and transmission timings are studied,which provides new ideas and methods for personalized monitoring and safe and reliable operation of wireless sensor networks.Based on heterogeneous nodes with different urgency and packet size in the practical application of wireless sensor networks,this paper studies the transmission path and transmission timing of these heterogeneous nodes,so that the nodes can upload monitoring information within the limit of urgency in time to avoid the occurrence of serious consequences that due to the non-urgent information occupying the transmission channel,the emergency information cannot be transmitted to the base station in time so that the base station cannot judge the processing in time.First,we use node urgency and data packets as the basis for network clustering,setting weight factors,and introducing flow,energy,and residual energy into cluster head elections to extend the network life cycle.Then we consider the urgency of nodes and the size of packets.,set delay evaluation function,and propose corresponding network transmission timing.Then,we added the hops of the node and the total number of nodes in the cluster which is affect the multi-hop network balance based on the single hop of the network for the routing protocols and transmission timing of multi-hop transmission for heterogeneous wireless sensor networks are studied.Finally,a digital simulation platform is built in MATLAB to simulate the proposed single-hop routing protocol/transmission timing and multi-hop routing protocol/transmission timing method.The simulation results show that this method can balance the urgency of the nodes in the network and the data packets to plan the path,extend the life cycle of the network,and reduce the time delay of the network by optimizing the time sequence,and improve the overall efficiency.The main research contents of this article include:(1)Heterogeneous wireless sensor network model based on node urgency and data packet heterogeneity is constructed.By learning and comparing the isomorphic wireless sensor networks and combining the urgency of monitoring information within the monitoring area,the need to distinguish between transmissions is required.A complete network model is constructed,and the structural characteristics of the heterogeneous sensor network are described.The network laid the foundation for transmission path planning and transmission timing planning for the next step.(2)Design a single-hop transmission routing protocol and transmission timing for heterogeneous wireless sensor networks.By comprehensively considering the urgency of the node,the packet and node spacing are clustered,and the weighting factor is set to represent the different facets when the cluster head is selected.Finally,the delay evaluation function is set and the transmission timing of single-hop transmission of the network is proposed.(3)Design a multi-hop transmission path and timing plan for heterogeneous wireless sensor networks.On the basis of single selection,considering the balance between the number of hops and the total number of nodes in the node cluster,setting the weight function represents the urgency of the node,the node spacing,and the remaining energy to complete the network routing protocol planning and improve the Transmission timing single-hop generation.